Low-water safety apparatus for steam-boilers.



w. B. HASKINS.

LOW WATER SAFETY APPARATUS FOR STEAM BOILERS.

APPLICATION FILED AUG. l7. 19M.

Patented Nov. 30

JGQJQ.

WILLIAM B. HASKINSQOF. LOS ANGELES, CALIFORNIA LOVV-WATEE ssr'n'rvAPPARATUS Fon STEAM- otness.

Specification of Letters Patent.

Fatented Nov. 39, 1915.

Application filed August 1'4, 191 i. Serial No. 857,274.

To all whom it may conomm:

Be it known that l, YVILLIAM B. Hasnixs. a citizen of the United tt-ates, residing at Los Angeles, in the county of Ros Angeles and Stateof California, have invented new and useful Improvements in Low-VaterSafety Apparatus for Steam-Boilers, of which the following is aspecification; My invention relates to improvements in low water safetyapparatus for steam boilers, having corrugated hollow disks apt toexpand in proportion to the temperature rise due to an inc ease in theheat; and the objects of my improvements are, first, to provide outletopenings for alarm and for the connection of fuel feeding shut offvalves;

and, second, to provide a fuel feeding shutoff valve having hollow dlsksapt'to shut off the fuel after the alarm hasbeen blowing; the inventionconsisting in the combination, construction, and. arrangement of deviceshereafter described and claimed.

In the accompanying drawings: Figure 1 is a vertical sectional view ofmy low-water safety apparatus and of my fuel-feeding sliut-o'li-valve,connected by a pipe. Fig. 2 is one element of the hollow disks invertical sectional view. Fig. 3 is one element in top view. Fig. at isone element in expanded position. Fig. 5 is my device attached to aboiler.

In accordance with my invention, the safety apparatus is shown on thedrawing in Fig. 1 as being mounted in a i'nain-casirtg 1, into which onthe upper end is screwed a. valve-casing 2, especially constructed forthis combination, being closed by a cap 3 on the top end and havingoutlet openings to the sides as indicated by l. The valve-casing 2bcii'ig 1n comn'iunicatlon with the maincasing 1 by an overflow 5. The.bottom end (l of the mi-ii'n-casing communicating with the steam boilerat the low water level as indicated by 7. A cylinder 8 extending down-12. The valve is to engage with the valve seat 13. Fig. 2 at 14 showscorrugations. which allow the disks to expand to a great height and alsoit willsln'nv that those disks can be made in a great variation a'slongas there is room enough inside to give good reheating and expandingparts will be the' same as explained on Fig. 1, only an eXtr. outletopening 18 is provided for the waste steam. This apparatus may beattached at a suitable place near the burner at the end 19. incomingfuelfrom 20 passing the valve 21,

which is open, unless steam from the low water safety apparatus closesit, will pass the end 19 to the burner. I

In case that the water in the boiler is coming below-the lowwater level,as indicated at '7. steam is going into the opening 6 and further intothe surrounding passage 9, heating the cylinder 8 and at the same timethe hollow disks 10. which. as being closed, will expand by the inclosedair, pushing up the valve 11 by stem 12, thus giving free passage forthe steam through outlet openings l. Openings of this kind may be hadand put in as many as available; for alarm-valve, whistle, fuel feedingshutoff-valves, etc. To one of these outlet openings 4 is a tube 22connected, bringing fsteam from the low water safety apparatus. to theinlet 17 of the fuel feeding shut off valve, after the disks in the lowwater safety apparatus have been expanded and the valve lifted. ivingfree passage to the steam to escape through the outlet openings 4,blowing out of one of these outlet openings for alarm and at the sametime giving steam to the fuel feeding shut oti' valve, as describedabove. Using it for my fuel feeding shutoff-valve. it has the advantage,that after the alarm alve has been blowing it gives time enough to fillup the boiler with water before the shut-oli-valve is warm enough toturn off the fuel.

The disks are shown as being hollow and closed for the reason that air.water, or any kind oi liquid, being inclosed. will expand very much bythe increasing heat and push.

out the flat side walls of the disks. To give m refinlis, with nameexpansive metal ugated disks are provided more c0mp11,te"impmvement.

Having thus described my invention, '01?! in k I 11 a low Water safetyapparatus for sieam boilers the combimtien with ainel caniroh lingdevice having a, valve herein and. sensitive expansion disks forepemting saicl valve to contrbl the supply of fuel of a, Water levelact/natal dtIVlCQ, having a connection adapted. its communicate with a.steam mailer at the low Water level valve therein ed to permit theegress of steam partly blowing out into me open fill foraalarm and e14-pansion disks for worming said last namecl valve, and 0 5 a. giipeconnection leading from the steam egress Cif the Water level. actuateddevice 10 the fuel com: oiling device and Mia; wL'l tn pass steam,simultaneously with the amrn1-i luwing, adjacent to the first meniioneclexpansion disks, whereby fuel supply is (:(riliLl'OllHl, lif thefluctuatiox s of ti; water level, all suhstanl'ially as descnhed.testimony whereof I hereunto allix my signature in the presence of liveWitnesses.

WILLFAM B. HASKINS.

ii itnesses ELTJFIR @TAQK, CLAUDE C. .RIJIAM.

